[W]hen the claim is “I didn’t know because I was raised in an insular
community,” there is reason for punishment precisely to send a message
to members of insular communities (and leaders of those communities)
that they need to work harder to learn the important commands of the
legal system. Conversely, cutting slack to people who don’t know the law
because they grew up in an insular community — or to people who claim
not to know the law for this reason — reinforces the tendency of many in
insular communities to focus more on following the norms of their
community than trying to learn and abide by the norms of society.

[W]hen the claim is “I didn’t know because I was raised in an insular
community,” there is reason for punishment precisely to send a message
to members of insular communities (and leaders of those communities)
that they need to work harder to learn the important commands of the
legal system. Conversely, cutting slack to people who don’t know the law
because they grew up in an insular community — or to people who claim
not to know the law for this reason — reinforces the tendency of many in
insular communities to focus more on following the norms of their
community than trying to learn and abide by the norms of society.